Hi Bert,
Thanks for the clarifications. In this case I recommand going to the new Spokes native interface without the complexity of dealing with COM and all the related issues This is available in the next major Spokes 3 release forthcoming this Spring. Since the URL to Sookes 3 download is not yet public, I have sent the link in a separate email to you. Checkout the sample code "MobileCallNative" and the document "Spokes 3 Programer's Guide" where this sample project is discussed
Wei Chu